Speed and pressure governor



Oct. 29, 1929. c. WAINWRIGHTII' 1,733,844

SPEED AND PRESSURE GOVERNOR Filed July 29, 1924 2 Sheets-Sheet 1 Oct.29, 1929. c. WAINWRIGHT SPEED AND PRESSURE GOVERNOR 2 Sheets-Sheet FiledJuly 29, 1924 for/7e Patented Oct. 29, 1929 CHARLES 'WAINWBIGHT, OFEENNSYLVAIIIA SPEED AND PRESSURE GOVERNOR Application filed July 29,

One object of my said invention is the provision of a steam drivencompressor in which the thermal working conditions are improved and ahigh ratio of expansion and maximum efiiciency are attained.

Another object is the provision of a steam driven compressor embodyingimproved and highly efficient automatic governing means.

Another object is the provision of a steam 1o driven compressor ofgeneral high eficiency.

Another object is the provision of a steam cylinder of high eficiencycharacterized by a steam valve that is automatically always tight, bymeans whereby an extremely short cut off can be brought about withoutcondensation due to highly efficient insulating means, by compressionvalves that aflord constant compression irrespective of the point of cutoff and by automatic means of high efficiency for controlling the cutoff.

Other objects and practical advantages of the invention will beunderstood from the following description and claims when the same areread in connection wth the drawings, ac-

i companying and forming part of this specification, inwhich Figure l isa side elevation showing a steam driven compressor constituting oneembodiment of my invention.

Figure 2 is an enlarged view, partly in elevation and partly in section,illustrating the preferred type of governor employed in the compressor.

Figure 3 is a vertical section of the governor at right angles to Figure4.

Figure 4 is an enlarged detail view of the connections to the safetyvalve 30.

Similar numerals designate corresponding 3 parts throughout the severalviews.

The engine to which my invention is shown applied includes the usualsteam cylinder 1 which contains the usual piston whose operation iscontrolled by a steam valve.

The valve gear of the engine includes a I block 21 in a link 22, and aconnection between the said block 21 and the steam valve comprises a rod23, Figures 1 and 2. The rod 28 is connected in turn, by a rod 24: withthe vertically swinging arm 25 of my novel-governor which is of the flyball type as clearly 1924. Serial No. 728,928. M

shown in Figures 1, 2 and By reference to said figures it will beunderstood that when the governor is in operation the arm 25 is raisedand lowered by centrifugal action, the said raising and lowering of thearm 25 being attended by raising and lowering of the link block 21 whichdetermines the cut off of the steam valve. In addition to the elementsreferred to, the governor comprises a piston 26 connected by a link 27with the arm 25, the said piston 26 being disposed in a cylinder 28 towhich is connected a pipe 29 for the control of the piston by the airpressure of the compressor 3O which is arranged in tandem, with thecylinder. as shown in Figure 1. 05 From this it follows that when apredetermined air pressure is reached, said pressure will operateagainst the piston 26 to raise the arm 25 and thereby raise the linkblock 21 W, and slow down the compressor. As the pressure'builds u thearm 25 will be raised by the raisingo the piston 26and the speed of theapparatus will be proportionately decreased. At 30 the governor isequipped with a safety valve, Figures 2 and-3, so constructed andarranged that in the event the driving connection, preferably belt orchain 50, of the governor is broken, live steam pressure will beutilized to raise the piston 26 and the m link block 21 and therebyslowdown the apso 'paratus. In this connection it will be apparent thatthe safety valve 30 is provided with a conduit '30 for the supply ofsteam thereto, and that the belt or chain 50 is con-' 'nected with thesafety valve in the manner" as best shown in Figure 4; also, that thevalve 30 depends on the governor, said valve being connected tothe steamline of the compressor and being closed when in its horizontal posia"tion. Should the belt 50 part the valve 30 be-co cause-of thegravitation of its weight 3O will be operated so as to permit steam topass to pipe 29 when the steam pressure will cause the piston 26 to moveupward and the gover- A nor to slowdown and stop the compressor. In thisconnection it will be noted that the belt 50 when normally operating hasone of its stretches in engagement with a. gravitational lever 30connected with the weighted. portion of the valve 80 as shown in Figures 4 and 5, and that gravitation of said lever 30 will be attendedby release and gravitation of the said weighted portion of the valve.

The lever 30 is equipped with wheels 30 5 above and below the rubberstretch of the belt 50, and hence said lever will be maintained in theposit-ion shown in Figure 4, so long as the belt 50 is intact, but'whenthe belt breaks the lever 30 will gravitatei. ei,

o'swing downwardly and disengage its flange 30 from the lateralupperportion of the arm 30 on the weighted portion of valve 30, therebypermitting downward movement of said weighted portion to establish thesupply of V steam to the pipe 29 and cylinder 28 and bring aboutstoppage of the compressor.

The steam inlet and the main exhaust for steam are designated by legendsin Figure 2,

and by comparison of Figures 2, 3 and 7 it will be understood'that steampasses from the inlet about the piston cylinder and past the steamvalveto the interior-ofcthe cylinder, and from the cylinder the exhauststeam is carried past the steam valve to the chambers in the head (seeupper arrowat right of Figure 3) and from said chambers the exhauststeam passes out through the main exhaust designated in Figure 2. 7

Having described my inventlon, what I claim and deslre to secure byLetters-Patent,

1. In combination, a centrifugal governor, drlving means therefor1nclud1ng. a steam engine and a belt, an arm connected with the vgovernor, a piston connected with said arm,

a valve gearincluding a block connected with a steam valve complementaryto said engine, v

3. In combination, a governor, driving means therefor including a steamengme and a dr1v1ng connectlon, a steam valve complementary to theengine and connected with and controlled by the governor, a-piston con,-nected with the governor, a cylinder containing said piston, anormally-closed valve adapted to be c'onnected-withsaid cylinder 'and'asource of steam supply, and means operable by mishap to the. drivingconnection to the governor for ;opening said valve 1 and supplying steamto said cylinder.

In testimony whereof I aflix my signature.

CHARLES WAINWRIGHT;

stretch of the belt and also having a flange a normally supporting saidrod and movable by gravitation of the lever out of engagement with therod.

2. In combination, a centrifugal governor, driving meansthereforincluding a steam engine and a belt',an arm connected with thegovernor, a piston connected with said arm,

a steam valve complementary to said engine, a valve gear including ablock connectedwith said steam valve and also connected with sa1d arm, acylinder containing said piston, a

normally-closed valve ada'ptedfto be connected with a source of steamsupply and said cylinder, gravitational means normally held by the beltagain st downward movement, and means for bringing about opening of thevalve on downward movement of saidgravitational means followingbreakage, of the 65 belt-I V

